Across
- 3. multiple substances mixed together
- 4. made up of atoms
- 5. a change you can get back
- 7. positive charge
- 10. a change you can not get back
- 11. nonmoving molecules
Down
- 1. smallest unit of life
- 2. neutral
- 4. anything that takes up space
- 6. negative charge
- 8. slow-moving molecules
- 9. fast-moving molecules